Is the Millennium dew white?

Dew refers to liquid water in which water vapor in the air condenses on ground objects. In the evening or at night, due to radiation cooling, the air layer near the surface also cools down. When the temperature drops below the dew point, that is, the water vapor content in the air is supersaturated, there will be water vapor condensation on the ground or the surface of the object. If the dew point temperature is above 0℃, tiny water drops will appear on the ground or ground objects, which is called dew.

Millennium is the 15 solar term in the "twenty-four solar terms", and the third solar term in autumn is the end of the application of the moon in the dry calendar and the beginning of the unitary month. Fighting fingers; The sun reaches longitude 165 degrees; Gregorian calendar September 7-9. "White dew" is an important solar term reflecting the growth of cold in nature. As the weather turns cold, it is sunny and hot during the day, but the temperature drops quickly after evening, and the temperature difference between day and night is large.